6721317992 has 32 divisors (see below), whose sum is σ = 12732033600. Its totient is φ = 3326168064.

The previous prime is 6721317989. The next prime is 6721318007. The reversal of 6721317992 is 2997131276.

It is a super-2 number, since 2×6721317992² = 90352231099165824128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1126088 + ... + 1132040.

It is an arithmetic number, because the mean of its divisors is an integer number (397876050).

Almost surely, 2^6721317992 is an apocalyptic number.

It is an amenable number.

6721317992 is a deficient number, since it is larger than the sum of its proper divisors (6010715608).

6721317992 is a wasteful number, since it uses less digits than its factorization.

6721317992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7385 (or 7381 counting only the distinct ones).

The product of its digits is 285768, while the sum is 47.

The square root of 6721317992 is about 81983.6446616031. The cubic root of 6721317992 is about 1887.2009547549.

The spelling of 6721317992 in words is "six billion, seven hundred twenty-one million, three hundred seventeen thousand, nine hundred ninety-two".